php mysqli starbhak

<?php
    //untuk koneksi ke database
    // Buka koneksi
function bukaKoneksi(){
    // connect ke database
    $DB_HOST = "192.168.64.2";
    $DB_DATABASE = "sekolahku";
    $DB_USERNAME = "affandy";
    $DB_PASSWORD = "12345678";
    $DB_PORT = "3306";
    // create connection
    $koneksi = new mysqli($DB_HOST, $DB_USERNAME, $DB_PASSWORD,  $DB_DATABASE, $DB_PORT);
    // check connection
    if($koneksi->connect_error) {
        die('Koneksi Gagal :' .$koneksi->connect_error);
    }
    return $koneksi;

}
//koneksi tutup
// Jalankan Query
function bacaSiswa(){
    $kun=bukaKoneksi();
    $data = mysqli_query($kun,"select * from students");
    return mysqli_fetch_array($data);
}